﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class StringUtil
    {
        public static Boolean AAA()
        {
            Boolean a ;
            Console.WriteLine("请输入：");
            string b = Console.ReadLine();
            if (string.IsNullOrWhiteSpace(b))
            {
                a = true;
            }
            else
            {
                a = false;
            }
            return a;
        }
    }
}
